What could this have been for ?? I can read Gerat NSK 11.The fl number is not completely legible. 6006 can be read.the firm is "Elektro-Feinbau List G.M.B.H Kist Teltow .Wkr PatLuftwaffe ww2 part.Gerat NSK 11Luftwaffe ww2 part.Gerat NSK 11Luftwaffe ww2 part.Gerat NSK 11